package com.example.forum.services.impl;

import com.example.forum.commen.AppResult;
import com.example.forum.commen.ResultCode;
import com.example.forum.dao.ArticleMapper;
import com.example.forum.exception.ApplicationException;
import com.example.forum.model.Article;
import com.example.forum.model.Board;
import com.example.forum.model.User;
import com.example.forum.services.IArticleService;
import com.example.forum.services.IBoardService;
import com.example.forum.services.IUserService;
import com.example.forum.utils.StringUtil;
import jakarta.annotation.Resource;

import lombok.extern.slf4j.Slf4j;
import lombok.val;
import org.springframework.stereotype.Service;

import java.util.Date;
import java.util.List;

@Slf4j
@Service
public class ArticleServiceImpl implements IArticleService {
    @Resource
    private ArticleMapper articleMapper;

    //用户和板块的操作
    @Resource
    private IUserService userService;
    @Resource
    private IBoardService boardService;

    @Override
    public void create(Article article) {
        if (article == null || article.getUserId() == null
            ||article.getBoardId() == null
            || StringUtil.isEmpty(article.getTitle())
            || StringUtil.isEmpty(article.getContent())) {
            //打印日志
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            //抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        //设置默认值
        article.setVisitCount(0);//访问数
        article.setReplyCount(0);//回复数
        article.setLikeCount(0);//点赞数
        article.setDeleteState((byte)0);//
        article.setState((byte)0);
        Date date = new Date();
        article.setUpdateTime(date);
        article.setCreateTime(date);
        //拆入数据
        int articleRow = articleMapper.insert(article);
        if(articleRow <= 0) {
            log.warn(ResultCode.FAILED_CREATE.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_CREATE));
        }
        //更新用户发帖数
        User user = userService.selectById(article.getUserId());//获取用户信息
        //没有找到指定用户信息
        if(user == null) {
            log.warn(ResultCode.FAILED_CREATE.toString()+"发帖失败 userid ="+article.getUserId());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_CREATE));
        }
        //更新用户发帖数
        userService.addOneArticleCountById(user.getId());
        //更新板块信息
        Board board = boardService.selectByPrimaryKey(article.getBoardId());
        if(board == null) {
            log.warn(ResultCode.FAILED_CREATE.toString()+"发帖失败 Board id ="+article.getBoardId());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_CREATE));
        }
        //更新板块帖子数量
        boardService.addOneArticleCountById(board.getId());
        //打印日志
        log.info(ResultCode.SUCESS.toString()+"user id ="
                +article.getUserId()+"board id = "+article.getBoardId()
                +"article id = "+article.getId()+"发帖成功");
    }

    @Override
    public List<Article> selectAll() {
        //调用dao
        List<Article> articles = articleMapper.selectAll();
        return articles;
    }

    @Override
    public List<Article> selectAllByBoardId(Long boardId) {
        //非空校验
        if(boardId == null || boardId<=0) {
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        //校验板块是否存在
        Board board = boardService.selectByPrimaryKey(boardId);
        if(board == null) {
            log.warn(ResultCode.FAILED_BOARDNOT_EXISTS.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_BOARDNOT_EXISTS));
        }
        //查询
        List<Article> articles = articleMapper.selectAllByBoardId(boardId);
        return articles;
    }

    @Override
    public Article selectDetailById(Long id) {
        //非空校验
        if(id == null || id<=0) {
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        //调用dao获得文章详情
        Article article = articleMapper.selectDetailById(id);
        if (article == null) {
            log.warn(ResultCode.FAILED_ARTICLENOT_EXISTS.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_ARTICLENOT_EXISTS));
        }
        //帖子访问数更新
        Article updateArticle = new Article();
        updateArticle.setId(article.getId());
        updateArticle.setVisitCount(article.getVisitCount()+1);
        //保存到数据库
        int row = articleMapper.updateByPrimaryKeySelective(updateArticle);
        if(row != 1) {
            log.warn(ResultCode.ERROR_SERVICES.toString()+"id="+updateArticle.getId());
            throw new ApplicationException(AppResult.failed(ResultCode.ERROR_SERVICES));
        }
        //返回帖子详情
        article.setVisitCount(article.getVisitCount()+1);
        //返回帖子详情
        return article;
    }

    @Override
    public Article selectById(Long id) {
        //非空校验
        if(id == null || id<=0) {
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        Article article = articleMapper.selectByPrimaryKey(id);
        return article;
    }

    @Override
    public void modify(Long id, String title, String content) {
        //非空校验
        if (id == null || id <= 0 || StringUtil.isEmpty(title) || StringUtil.isEmpty(content)) {
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        //构建要更新的帖子
        Article updatearticle = new Article();
        updatearticle.setId(id);
        updatearticle.setTitle(title);
        updatearticle.setContent(content);
        updatearticle.setUpdateTime(new Date());
        //更新
        int  row = articleMapper.updateByPrimaryKeySelective(updatearticle);
        if(row != 1) {
            log.warn(ResultCode.ERROR_SERVICES.toString()+"id="+updatearticle.getId());
            throw new ApplicationException(AppResult.failed(ResultCode.ERROR_SERVICES));
        }
    }

    @Override
    public void thumbsUpById(Long id) {
        /*非空校验*/
        if(id == null || id < 0) {
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        //获取帖子详情
        Article article = articleMapper.selectByPrimaryKey(id);
        if(article == null|| article.getDeleteState() == 1) {
            log.warn(ResultCode.FAILED_ARTICLENOT_EXISTS.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_ARTICLENOT_EXISTS));
        }
        //帖子状态异常
        if(article.getState() == 1 ) {
            log.warn(ResultCode.FAILED_ARTICLE_BANNED.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_ARTICLE_BANNED));
        }
        Article updateArticle = new Article();
        updateArticle.setId(article.getId());
        updateArticle.setLikeCount(article.getLikeCount()+1);
        updateArticle.setUpdateTime(new Date());
        //调用Dao
        int row = articleMapper.updateByPrimaryKeySelective(updateArticle);
        if(row != 1) {
            log.warn(ResultCode.ERROR_SERVICES.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.ERROR_SERVICES));
        }
    }

    @Override
    public void deleteById(Long id) {
        /*非空校验*/
        if(id == null || id < 0) {
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        //根据id查询帖子信息
        Article article = articleMapper.selectByPrimaryKey(id);
        if(article == null || article.getDeleteState() == 1) {
            //打印日志
            log.warn(ResultCode.FAILED_ARTICLENOT_EXISTS.toString());
            //抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_ARTICLENOT_EXISTS));
        }
        //构造更新对象
        Article updateArticle = new Article();
        updateArticle.setId(article.getId());
        updateArticle.setDeleteState((byte) 1);
        //调用Dao
        int row = articleMapper.updateByPrimaryKeySelective(updateArticle);
        if(row != 1) {
            log.warn(ResultCode.ERROR_SERVICES.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.ERROR_SERVICES));
        }
        //更新板块中帖子数
        boardService.subOneArticleCountById(article.getBoardId());
        //更新发帖数
        userService.subOneArticleCountById(article.getUserId());
        log.info("删除帖子成功, article id= " + article.getId()+" user id = "+article.getUserId() +" board id = "+article.getBoardId());
    }

    @Override
    public void addOneArticleReplayCountById(Long id) {
        /*非空校验*/
        if(id == null || id < 0) {
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        //获取帖子信息
        Article article = articleMapper.selectByPrimaryKey(id);
        if(article == null || article.getDeleteState() == 1) {
            log.warn(ResultCode.FAILED_ARTICLENOT_EXISTS.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_ARTICLENOT_EXISTS));
        }
        if(article.getState() == 1) {
            log.warn(ResultCode.FAILED_ARTICLE_BANNED.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_ARTICLE_BANNED));
        }
        Article updateArticle = new Article();
        updateArticle.setId(id);
        updateArticle.setReplyCount(article.getReplyCount()+1);
        updateArticle.setUpdateTime(new Date());
        //调用dao
        int row = articleMapper.updateByPrimaryKeySelective(updateArticle);
        if(row != 1) {
            log.warn(ResultCode.ERROR_SERVICES.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.ERROR_SERVICES));
        }
    }

    /*根据用户id查询帖子*/
    @Override
    public List<Article> selectByUserId(Long userId) {
        if(userId == null || userId <= 0) {
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        //校验用户是否存在
        User user = userService.selectById(userId);
        if(user == null) {
            log.warn(ResultCode.FAILED_USER_NOT_EXISTS.toString()+"user id = "+userId);
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_USER_NOT_EXISTS));
        }
        //调用Dao
        List<Article> list = articleMapper.selectByUserId(userId);

        return list;
    }
}
